Periods in options unexpected transmuted into commas

[michael-ts]

I'm passing a decimal value as an option to a filter, e.g. "0.1".

But when I try to save the filter it errors out, and I see the following text output in the console:

[Eval @ 0x7ffd9acbef20] Invalid chars ',1' at the end of expression '0,1'

I can't enter a comma instead of a period to see if it will transmute it back to the required period. Yet I also can't enter a valid option because it's being turned into an invalid one.