As far as path loss…
Concrete is bad. Brick is usually bad. Metal is bad. Water (in pipes, for example) is bad. Drywall may be bad, depends on the mix. Reinforced shingles can be very bad. Any right turn can be problematic.
So coming from outdoors to indoors, it’s not at all uncommon for things to be much worse on one side of the house than the other, just depends how everything is laid out.
Also: garage containing car often has totally different pattern than empty garage.
If you haven’t already, read the FAQ on range and repeaters: