I did see the same. The new Ver. stops at around 260k and the original source, ver. 1 is at 1,526,779.
Can you open your debug.log and see what is happening after that last block on the most recent version?
2020-06-05 04:01:20 SetBestChain: new best=5328118f4eaacc4fad73230bfd934ce6053dfbf040cdc2233b7b17ec13cfeb71 height=267267 log2_work=47.793211 tx=281958 date=2014-05-20 13:38:22 progress=0.002784
2020-06-05 04:01:20 ProcessBlock: ACCEPTED
2020-06-05 04:01:20 SetBestChain: new best=2d2f8c16286a13a8dde1349e32dc04142f546aaa5f5f60c19e024788b41414d0 height=267268 log2_work=47.793217 tx=281959 date=2014-05-20 13:40:19 progress=0.002784
2020-06-05 04:01:20 ProcessBlock: ACCEPTED
2020-06-05 04:01:20 SetBestChain: new best=896b0ce91d5d7b3512871444a05f53d34c4c0e6c338b1c6de0e6c92aa10debb9 height=267269 log2_work=47.793222 tx=281960 date=2014-05-20 13:41:28 progress=0.002784
2020-06-05 04:01:20 ProcessBlock: ACCEPTED
2020-06-05 04:01:20 nActualTimespan = 1633 before bounds
2020-06-05 04:01:20 GetNextWorkRequired RETARGET
2020-06-05 04:01:20 nTargetTimespan = 1800 nActualTimespan = 1636
2020-06-05 04:01:20 Before: 1d04e6a2 00000004e6a20000000000000000000000000000000000000000000000000000
2020-06-05 04:01:20 After: 1d047452 00000004745262fc962fc962fc962fc962fc962fc962fc962fc962fc962fc962
2020-06-05 04:01:20 ERROR: AcceptBlock() : incorrect proof of work
2020-06-05 04:01:20 ERROR: ProcessBlock() : AcceptBlock FAILED
2020-06-05 04:01:20 ProcessBlock: ORPHAN BLOCK, prev=595e91d2ab47f6313c48802a8befce80d83757c095350b1f3b0ce7127fe2b0f6
2020-06-05 04:01:20 ProcessBlock: ORPHAN BLOCK, prev=a7746774a8a7fb7b7ff9743da07fc94425735480308eaa9b94a8d940888fa399
2020-06-05 04:01:20 ProcessBlock: ORPHAN BLOCK, prev=b5b700792830ab74a84fac1ead87819b5b83927b422b4516c3fcc43644f032b4
2020-06-05 04:01:20 ProcessBlock: ORPHAN BLOCK, prev=ac654dae7e65d8d4ffc420f36e00331c1ca1015bcb967eb14de49064dac8183d
2020-06-05 04:01:20 ProcessBlock: ORPHAN BLOCK, prev=bed71032c009754f07cc54f874ba41097e6bf65b7ff1983f19602e4d35319138