Tvheadend

I just posted a bug report at https://tvheadend.org/issues/4535 that reads as follows:

I upgraded Tvheadend to 4.2.3-20~g407c8a3 today and now my TBS 6991SE DVB-S/S2 tuner card simply will not receive anything. Note that although the card has a CA slot, I am not using it since there is no programming that uses that type of conditional access in this part of the world. I have been using it for straight free-to-air reception on North American satellites prior to today's upgrade. I have other TBS cards in this system that do not have a CA slot; they worked under 4.0.9 and continue to work after the upgrade - it is only the TBS 6991SE that fails to work under the new Tvheadend version. My suspicion, although I could be totally off-base on this, is that Tvheadend is detecting that the card has a CA slot and even though it is disabled (it shows "ca0: disabled" under both tuners in the TV adapters tab), perhaps Tvheadend is looking for a decoder that doesn't exist or something? I'm sure it's not common for someone to have a TBS 6991SE and not use the CA slot, but that is the case here and I think that maybe 4.0 didn't look for such a slot and treated the card normally, whereas the new version sees that it has a CA slot and doesn't quite accept the fact that it's not being used for CA programming. When I try to tune in a signal on this card all it does is throw a bunch of continuity errors, whereas it worked fine under 4.0.9. This is the case on both inputs of the card, which are connected to completely separate C-band LNB's on separate dishes, both of which worked prior to the upgrade.

I'm hoping a fix will appear sometime soon, but in the meantime, has anyone else had this issue? And if so, did you by any chance find a workaround?