for that sync, there will be a number of errors in the log file.
write a script to read the log file, extract the bad filenames into a text file and then use an exclude filter
i do a similar thing using a python script.
the scripts scans the log file looking for ERRORS and some other text.
it writes that info to a text fie and emails it to me.
perhaps try something like this
https://forum.rclone.org/t/raw-filename-exclude-best-way-to-exclude-specific-list-of-complex-file-names/26571/4