[wp-trac] [WordPress Trac] #57500: Plugin update results in mixing files of old and new versions

[WordPress Trac]

#57500: Plugin update results in mixing files of old and new versions
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 Reporter:  Chouby           |       Owner:  (none)
     Type:  defect (bug)     |      Status:  new
 Priority:  normal           |   Milestone:  Awaiting Review
Component:  Upgrade/Install  |     Version:
 Severity:  normal           |  Resolution:
 Keywords:  needs-testing    |     Focuses:
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Comment (by pbiron):

 @costdev I can confirm that the steps you outline are correct.

 @Chouby I can also confirm that a successful update to Polylang 3.3.1 does
 not result in the errors reported in the various support form posts you
 link to: I'm an active user of Polylang (thanx for a great plugin) and
 updated a number of sites.

 This leads me to 2 questions:

 1. what additional plugins are installed on the affected sites (of the
 users reporting problems)?
 2. what `WP_Filesystem->method` is used on the affected sites (`direct`,
 `ssh2`, `ftpext`, or `ftpsockets`)?

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Ticket URL: <https://core.trac.wordpress.org/ticket/57500#comment:2>
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