My old single plant and other seen in SE Portland are largely defoliated.

Leaf burn starts in mid-20s and teens will result in much leaf drop, usually

a gradual process. My 10,000+ leaf bush is down to fewer than 1,000 leaves.

Leaves on newer growth tend to hang on better.

My plant has never failed to leaf back out, looking good by 1 June.

If bloom is delayed past 1 July, fruit may not set well or ripen that year.

I planted two pineapple guava last spring.  Until a few days ago they both looked completely dead.  But today I see tiny buds forming, so hopefully they survived?