svn x-shelve fails with "checksum mismatch" error

I just gave the experimental shelve-feature a try and ran into a
"checksum mismatch" error when invoking "svn x-shelve". Any ideas how to
resolve this?

D:\temp\tiny.dir.svn>dir
...
03.08.2020 14:30 <DIR> .
03.08.2020 14:30 <DIR> ..
03.08.2020 14:30 36 sub.txt
                1 File(s) 36 bytes
                2 Dir(s) 4 923 518 976 bytes free

D:\temp\tiny.dir.svn>svn diff
Index: sub.txt
===================================================================
--- sub.txt (revision 960)
+++ sub.txt (working copy)
@@ -1,4 +1,4 @@
-1
+1a
  2
  3
  4

D:\temp\tiny.dir.svn>svn info
Path: .
Working Copy Root Path: D:\temp\tiny.dir.svn
URL: file://localhost/D:/svnrepos/test/tiny/trunk/dir
Relative URL: ^/tiny/trunk/dir
Repository Root: file://localhost/D:/svnrepos/test
Repository UUID: b64c88d0-5acc-524b-887a-f04c2292f55f
Revision: 960
Node Kind: directory
Schedule: normal
Last Changed Author: marc
Last Changed Rev: 893
Last Changed Date: 2017-09-26 16:04:19 +0200 (Di, 26 Sep 2017)

D:\temp\tiny.dir.svn>svn x-shelve shelf1
--- Shelve 'shelf1' in WC root 'D:/temp/tiny.dir.svn'
--- Shelving...
Updating '.svn\experimental\shelves\v3\7368656c6631-001.wc':
At revision 960.
Sending sub.txt
Transmitting file data .svn: E200014: Checksum mismatch for
'D:\temp\tiny.dir.svn\.svn\experimental\shelves\v3\7368656c6631-001.wc\sub.txt':
    expected: ec87e2cd3ddf5490cbe10e07301c114c
      actual: b89724a2cec6a05364bb3af4c74fd452

Tested on Windows 8.1 with Subversion 1.14.0 (built ourselves).

--
Best regards,
Marc Strapetz
=============
syntevo GmbH
http://www.syntevo.com