When the last build adds a new stage and remove an existing stage, only last build is shown in Stage view.

In attached images you can see build #4 correctly add Stage 3
But build #5 does'nt old builds

build #1-3 pipeline definition:
node {
stage 'Stage 1'
echo 'Hello World 1'
stage 'Stage 2'
echo 'Hello World 2'
}

build #4 pipeline definition:
node {
stage 'Stage 1'
echo 'Hello World 1'
stage 'Stage 2'
echo 'Hello World 2'
stage 'Stage 3'
echo 'Hello World 3'
}

build #5 pipeline definition:

node {
stage 'Stage 1'
echo 'Hello World 1'
stage 'Stage 2'
echo 'Hello World 2'
stage 'Stage 4'
echo 'Hello World 4'
}

Also, it doesn't work when stages are conditionnal