`select ... where ... in (...)` display incorrectly

Table `user_groups` has only 2 columns: `user_id`, `group_id`
I have 3 different user_id: 100111, 100112, 100113
User 100111 belongs to 446 different groups, and users 100112 and 100113 are inserted as below:
 

DELETE FROM user_groups WHERE user_id = '100112';
DELETE FROM user_groups WHERE user_id = '100113';
INSERT IGNORE INTO user_groups (user_id, group_id)
SELECT '100112' AS user_id, group_id FROM user_groups WHERE user_id = '100111';
INSERT IGNORE INTO user_groups (user_id, group_id)
SELECT '100113' AS user_id, group_id FROM user_groups WHERE user_id = '100111';

But when I use the statement `SELECT * FROM user_groups WHERE user_id in ('100111', '100112', '100113')` it shows 446 records for user 100111 but only 54 for user 100112. Then for user 100113, it is not displayed. I clicked the icon used "Local Filter For `user_id`" and it shows neither.
While `SELECT * FROM user_groups WHERE user_id = ...` all show the full 446 records for each user.

It takes me a lot of time to research why my code doesn't work well it shows only 54 records.
For security reasons, I cannot upload the attached photos.

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