Yandex:
After upgrading to version 2.47.0, the "E" flag was added to the "Router Caps" field in addition to the flags already installed. For example, I have a set of "Router Caps: XfR" for a couple of days, and then suddenly "Router Caps: XfRE" appears for an indefinite time. What are the reasons?
All my router caps are L.
My guess is that it relates to memory or swap. This question is more for the developers. You can try shutting down some apps or have some activity monitor for processes. You can also test with Kaisen or similar your os. See if a live OS does the same thing.