Oracle has been timing out consistently toward the end of the day with no warning

Summary:

Oracle has been timing out consistently toward the end of the day with no warning. It usually happens between 3 PM and 5 PM. If I haven’t manually saved my work before the timeout occurs, everything I was working on is lost. Has anyone else experienced this or found a solution?

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Version (include the version you are using, if applicable):

26a

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