Also not unusual. Every speaker knows that there will be a political price to be paid in the mid-terms. I'm not a fan of his, but I don't understand this expectation that he diverge from how his predecessors have related to presidents of their own party. It would be very unusual if there were any political daylight between him and the president.
The only exception I can think of is at the very end of Watergate, John Rhodes, Hugh Scott and Barry Goldwater went in to explain to Nixon that his support on the Hill had evaporated. And that was at the bitter end. Before that all three were extremely loyal to Nixon.
Nothing like that is going to happen to Trump because his core voters have shown they will stick with him no matter what. And they are a big enough group that it would be political suicide for anyone in the Republican Party to turn on him. Look at what happened to the Republicans who voted to impeach him during his first term.