Sorry to hear that you are having problems.
On the rear shock, on those corrugated roads that shock works very hard and as a result get very hot. Also the shock is hidden away a bit so it does not get much cooling air flow past it plus the hot exhaust pipe is also right next to it so that does not help either. So take it easy and let the shock cool down from time to time.
BTW in northern Kenya there is a road that is named the shock killer.
Enjoying your report.
1998 KLR 680C; to many mods to list.
2007 BMW 1200GSA.