I have recently also run into this issue on the following:
Sharp Roku TV model: LC-50LB481U
Hardware ID: 5318X
Software Version: 11.5.0 build 4312-13
As we approach 6 months since any update on a solution can you say if there is any idea what sort of timeframe we can expect? The original estimate of "hoping to get everything sorted out soon" would seem to have expired, since nobody would call over 5 months "soon."