Chart missing last day

On the basic chart, eg https://seekingalpha.com/symbol/SPY

Often either the 5D (5 day) or 1M (1 month) range are missing the last day's price info. So last trading day was 6/12, but on 5D can only see till 6/11 prices.

Not sure if it's due to timezones (it shouldn't as it follows NYSE est time).

When the market's open, the ranges that are broken also changes it seems. And the 1D stays blank for the first few hours after market open.

In contrast, the advanced chart is working fine on all ranges.