thread_pool_info fails randomly in 10.5

https://buildbot.askmonty.org/buildbot/reports/cross_reference with test "thread_pool_info" shows a lot of failures, mostly in 10.5

Example:
https://buildbot.askmonty.org/buildbot/builders/kvm-deb-bionic-amd64/builds/2721

main.thread_pool_info w1 [ fail ]
Test ended at 2019-08-16 10:29:34

CURRENT_TEST: main.thread_pool_info
— /usr/share/mysql/mysql-test/main/thread_pool_info.result 2019-08-16 07:40:14.000000000 -0400
+++ /dev/shm/var/1/log/thread_pool_info.reject 2019-08-16 10:29:34.265336935 -0400
@@ -55,7 +55,7 @@
FLUSH THREAD_POOL_STATS;
SELECT SUM(DEQUEUES_BY_LISTENER+DEQUEUES_BY_WORKER) FROM INFORMATION_SCHEMA.THREAD_POOL_STATS;
SUM(DEQUEUES_BY_LISTENER+DEQUEUES_BY_WORKER)
-1
+0
SELECT SUM(POLLS_BY_LISTENER+POLLS_BY_WORKER) FROM INFORMATION_SCHEMA.THREAD_POOL_STATS;
SUM(POLLS_BY_LISTENER+POLLS_BY_WORKER)
2