Disenrolled courses still appear in "my-courses" page

### Reproduction Steps

+ Login as a student
+ Enroll in any course
+ As an admin disenroll that student from the course
+ Back to student and open "my-courses" page, and will see the disenrolled course there

### Expected Behavior

+ Should disappear because it's not belong to that student anymore

### Actual Behavior

+ Disenrolled courses still appear

### Note
If i open the course page i will see the Enroll button, So that course from my-courses is really not mine

and actually it's more obvious in my case, because i made a plugin that provide the Disenroll functionality for the students (i would like to share it with you if you want ), so it's not expected for student to disenroll from a course and he find it in "my-courses" page

### Error Messages / Logs

+ Include any relevant error messages or log files
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### System and Environment Information

System Report

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This issue has be recreated:
+ [ ] Locally
+ [ ] On a staging site
+ [ ] On a production website
+ [x] With only LifterLMS and a default theme

### Browser, Device, and Operating System Information

+ Browser name and version
+ Operating System name and version
+ Device name and version (if applicable)