I have no DSMR4 device to test only DSMR3 and both are running latest 0.47 with no problems.
My guess is judging on speedyco’s dump the DSMR4 first telegram is received incomplete (serial input buffer has partial data) which causes an exception and the way these are now handled in HA is different then before 0.46.
I created a issue on github, please subscribe to this for updates as I will keep track of updates there: https://github.com/home-assistant/home-assistant/issues/8128
If others could please verify if they see the same behaviour as speedyco or if it is different, please post this info on the github issue. If you find anything else which you think might be related please share it as well.