Funny enough I have that tab open, and just reading about when I came back here to check for replies. Thanks for the advice! I'll report back here with what I find.
Hmm, cashapp gets a different error when paying an lnbits or thunderhub generated invoice wrapped with lnproxy, error code: "Invoice missing valid amount...Please create or requests a new invoice with an amount of at least 1 satoshi". For reference, phoenix and strike do pay proxy wrapped invoice.
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