Having clause not filter some rows - mysql

Question

Have query which calculates average scores by users, want to add condition to show score in some range
Select byUserAndQ.email, byUserAndQ.userName,
round( avg(byUserAndQ.innerScore) ) as score,
round( avg (byUserAndQ.innerScore) ) >=50 as inRange
from (
SELECT tu.email, tu.name as userName,
sum(ta.score)/q.max_score*100 as innerScore
FROM test t
INNER JOIN test_user tu ON tu.test_id = t.id
LEFT JOIN test_action ta on ta.test_id = t.id and ta.email = tu.email
LEFT JOIN question q ON q.id = ta.question_id
WHERE t.id = 144
AND tu.email IS NOT NULL
GROUP BY tu.email, q.id ) as byUserAndQ
group by byUserAndQ.email
having score>= 50
returns me all rows instead score>=50:
user1#example.com, User1,56,1
user2#example.com, User2,28,0
user3#example.com,User3,78,1
if I remove , byUser.userName from top select - it working fine. which is very strange for me. I think Having should be applied to final data, so no matter which fields else in result.
Also tried to group by name as well - without success:
Select byUserAndQ.email, byUserAndQ.userName,
round( avg(byUserAndQ.innerScore) ) as score,
round( avg (byUserAndQ.innerScore) ) >=50 as inRange
from (SELECT tu.email, tu.name as userName,
sum(ta.score)/q.max_score*100 as innerScore
FROM test t
INNER JOIN test_user tu ON tu.test_id = t.id
LEFT JOIN test_action ta on ta.test_id = t.id and ta.email = tu.email
LEFT JOIN question q ON q.id = ta.question_id
WHERE t.id = 144
AND tu.email IS NOT NULL
GROUP BY tu.email, tu.name, q.id
) as byUserAndQ
group by byUserAndQ.email, byUserAndQ.userName
having score>= 50
wrapping in another subquery with where works fine as well:
select * from (Select byUser.email, byUser.userName, round( avg(byUser.innerScore) ) as score, round( avg (byUser.innerScore) ) >=50 as inRange
from (SELECT
tu.email, tu.name as userName,
sum(ta.score)/q.max_score*100 as innerScore
FROM test t
INNER JOIN test_user tu ON tu.test_id = t.id
LEFT JOIN test_action ta on ta.test_id = t.id and ta.email = tu.email
LEFT JOIN question q ON q.id = ta.question_id
WHERE t.id = 144
AND tu.email IS NOT NULL
GROUP BY tu.email, q.id ) as byUser
group by byUser.email ) as final
where score>= 50
Why its working in such way?
MySql version: 5.7.12( AWS Serverless RDS )