Error in Jail mount points after update to 11.2-U4

Jail mount points fail to validate, and cannot be edited to correct the problem:

Error: concurrent.futures.process._RemoteTraceback:
"""
Traceback (most recent call last):
File "/usr/local/lib/python3.6/site-packages/middlewared/plugins/jail.py", line 707, in fstab
dump, _pass, index=index
File "/usr/local/lib/python3.6/site-packages/iocage_lib/iocage.py", line 1037, in fstab
index=index
File "/usr/local/lib/python3.6/site-packages/iocage_lib/ioc_fstab.py", line 81, in _init_
self.dests = self._validate_fstab_(self.fstab, 'all')
File "/usr/local/lib/python3.6/site-packages/iocage_lib/ioc_fstab.py", line 279, in _validate_fstab_
exception=iocage_lib.ioc_exceptions.ValidationFailed
File "/usr/local/lib/python3.6/site-packages/iocage_lib/ioc_common.py", line 90, in logit
_callback(content, exception)
File "/usr/local/lib/python3.6/site-packages/iocage_lib/ioc_common.py", line 64, in callback
raise callback_exception(message)
iocage_lib.ioc_exceptions.ValidationFailed: ["Malformed fstab at line 0: '/mnt/vol1/Video /mnt/vol1/iocage/jails/medusa/root/mnt/series nullfs rw 0 0'", "Malformed fstab at line 1: '/mnt/vol1/torrent_data /mnt/vol1/iocage/jails/medusa/root/mnt/downloads nullfs rw 0 0'"]

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/local/lib/python3.6/concurrent/futures/process.py", line 175, in _process_worker
r = call_item.fn(*call_item.args, **call_item.kwargs)
File "/usr/local/lib/python3.6/site-packages/middlewared/worker.py", line 131, in main_worker
res = loop.run_until_complete(coro)
File "/usr/local/lib/python3.6/asyncio/base_events.py", line 468, in run_until_complete
return future.result()
File "/usr/local/lib/python3.6/site-packages/middlewared/worker.py", line 91, in _run
return await self._call(name, serviceobj, methodobj, params=args, job=job)
File "/usr/local/lib/python3.6/site-packages/middlewared/worker.py", line 84, in _call
return methodobj(*params)
File "/usr/local/lib/python3.6/site-packages/middlewared/worker.py", line 84, in _call
return methodobj(*params)
File "/usr/local/lib/python3.6/site-packages/middlewared/schema.py", line 668, in nf
return f(*args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/middlewared/plugins/jail.py", line 719, in fstab
raise CallError(e.message)
middlewared.service_exception.CallError: [EFAULT] Malformed fstab at line 0: '/mnt/vol1/Video /mnt/vol1/iocage/jails/medusa/root/mnt/series nullfs rw 0 0'
Malformed fstab at line 1: '/mnt/vol1/torrent_data /mnt/vol1/iocage/jails/medusa/root/mnt/downloads nullfs rw 0 0'
"""

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/usr/local/lib/python3.6/site-packages/middlewared/main.py", line 166, in call_method
result = await self.middleware.call_method(self, message)
File "/usr/local/lib/python3.6/site-packages/middlewared/main.py", line 1097, in call_method
return await self._call(message['method'], serviceobj, methodobj, params, app=app, io_thread=False)
File "/usr/local/lib/python3.6/site-packages/middlewared/main.py", line 1042, in _call
return await self._call_worker(name, *args)
File "/usr/local/lib/python3.6/site-packages/middlewared/main.py", line 1062, in _call_worker
return await self.run_in_proc(main_worker, name, args, job)
File "/usr/local/lib/python3.6/site-packages/middlewared/main.py", line 996, in run_in_proc
return await self.run_in_executor(self.__procpool, method, *args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/middlewared/main.py", line 972, in run_in_executor
return await loop.run_in_executor(pool, functools.partial(method, *args, **kwargs))
middlewared.service_exception.CallError: [EFAULT] Malformed fstab at line 0: '/mnt/vol1/Video /mnt/vol1/iocage/jails/medusa/root/mnt/series nullfs rw 0 0'
Malformed fstab at line 1: '/mnt/vol1/torrent_data /mnt/vol1/iocage/jails/medusa/root/mnt/downloads nullfs rw 0 0'