Have you logged it for several years ... it should alter slightly through different times of the year a bit-
The sun outage on 26e on undersized dishes is regular over a period but alters through the year with the seasons... that is the sun getting behind the satellite we think... and that explains the brief outage compared to 2d. Also it can be difficult to measure it on larger dishes.
But 2d's evening outage sounds more like the setting sun in the west hitting the antenna of the satellite..? that is... 28e/ 2d in the east is 'aiming' westward to the UK and the setting sun is in the west low ... aiming in part back over the east at a similar low angle doing a bit of an unwanted 'solar' uplink..
Well... it sounds good ... even if it’s complete ‘/*&^%…
(could be bang on actually)