This is likely a bug in the lnbits zap implementation that we use. The best path for you guys is to open an issue in the lnbits repo. This will lead to this functionality being fixed for multiple users including us.
Have a good one. And feel free to help lightning goats routing by opening channels to:
0382d558331b9a0c1d141f56b71094646ad6111e34e197d47385205019b03afdc3
03fe48e8a64f14fa0aa7d9d16500754b3b906c729acfb867c00423fd4b0b9b56c2
