Hello,
I’m sorry for the late reply.
Since this looks a lot like a conflict with some other code, the first recommended step is the conflict test (ideally in a staging environment):
??*Briefly* disable all other plugins and enable the default Twenty Twenty theme. Please also disable all add-ons. If this fixes the problem, as it probably will, enable everything one by one, checking each time to see when the problem returns.
Please let us know when you find the conflict so that we can take a look and see what we can do about it.
Best regards,
Cristian