I may have caused my client disconnect issue with the last two firmware, 42643 and now 44470. I was using -55 dBm for my 2.4 Roaming Assistant RSSI threshold. Today, I determined that this was 5 to 10 dBm more positive/stronger than the measured signal power of the competing WLAN signals at the 'halfway point' between the nodes where the signals are roughly equal. So, I think my client was being disconnected in that zone and kept from re-connecting... an 'RA no-connection zone'. Not seamless.
The fix so far has been to lower the 2.4 RA RSSI threshold to -70 dBm (back to the default!), which is about 5-10 dBm more negative/weaker than the competing WLAN signals at the 'halfway point'. Now my client seems to hold its connection until farther away past the 'halfway point', beyond which it will disconnect and then connect to the other node. My two AC86Us are 77' apart.
Summary?: RA RSSI threshold dBm needs to be set more negative/weaker than the 'halfway point' signal dBm so that the client stays connected past halfway, where upon it disconnects and can then connect to the next signal/node.
I used
WiFi Analyzer Classic to get a rough measure of signal power at the 'halfway point'
OE