Less stable HAN parsing lately

[StarkJohan]

Recently, I can't say exactly after what version update, I've noticed a lot more errors in the data parsing. I'm constantly seeing "Footer checksum error" and "Unknown data received, check meter config". Sometimes it's just one "red" error until the next 10s update, sometimes it takes multiple updates to clear the error, say 3-5 x 10s updates in a row is erroneous. I have not changed anything in my config and the parsing has been very consistent previously, say 99% hit ratio. Now it's more like 75% correct readouts. Not a big issue but I wanted to inform you in case there's been any recent software changes that might cause more errors than before.

Kamstrup Omnipower without adapter HAN-NVE configuration, DLMS output, no encryption Pow-K (old kit version). Currently on software v2.3.6 2400 / 8N1 / Buffer 256

Any idea on what might cause the increase in errors? Hardware/software issue?