Maybe it has nothing to do with the wave, the money just stopped ticking, like i had income of 143k but only 64 gold on me, not 64k just 64, that was the main reason i stopped playing.
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That is so bizarre, I never got that but I guess it might be some other problem. Probably there's not much to do but restart. In case I play it again I might keep an eye if I get that because if money just stops it might really not be possible to get around that one.
Only other thing I can think of is, and I just thought of it now actually, is that if usually playing the web build, maybe the Desktop build doesn't have the issue (but that's only if you can play that build). I did not get the issue myself and only played the web version, but it might just be a matter of time and I might get the problem as well.