DYI. The page does not always renders fully

Hello All.

I wonder if it is normal.
The web page of the meter does not always renders fully.
Example below. Please note there are missing buttons.

I need to refresh the page to have it working OK.

Happens sometimes, not always, especially after some time interval.
The wifi seems to be stable.

Log sample:

* Restart **

SD initialized.
Real Time Clock not running.
Reset reason: Software/System restart
Trace:  31:100, 11:50, 11:55, 11:70, 1:4, 1:1[5], 1:2[6], 9:0[6], 9:0, 9:1, 8:4, 8:6, 8:8, 9:3, 9:5, 9:9, 1:3, 1:3, 1:1[6], 1:2[7], 9:0[7], 9:0, 9:1, 8:4, 8:6, 8:8, 9:3, 9:5, 9:9, 1:3, 10:2, 10:3
ESP8266 ID: 741784, RTC unknown
IoTaWatt 5.0, Firmware version 02_07_05
SPIFFS mounted.
Local time zone: +0:00
device name: iota
Connecting with WiFiManager.
HTTP server started
influxDB_v2: Starting, interval:10, url:...:8086
WiFi connected. SSID=local, IP=... channel=3, RSSI -77db
timeSync: service started.
statService: started.
Updater: service started. Auto-update class is MAJOR
influxDB_v2: Start posting 07/06/22 00:00:10
7/14/22 16:38:50z timeSync: RTC initalized to NTP time
7/14/22 16:38:50z dataLog: service started.
7/14/22 16:38:50z dataLog: Last log entry 07/14/22 16:38:40
7/14/22 16:38:50z historyLog: service started.
7/14/22 16:38:50z historyLog: Last log entry 07/14/22 16:38:00
7/14/22 16:38:51z Updater: Auto-update is current for class MAJOR.
7/14/22 17:38:50z timeSync: adjusting RTC by 711135529
7/14/22 18:38:50z timeSync: adjusting RTC by 711139129
7/14/22 19:38:50z timeSync: adjusting RTC by 711142729
7/14/22 20:38:50z timeSync: adjusting RTC by 711146329
7/14/22 21:38:50z timeSync: adjusting RTC by 711149929
7/14/22 22:38:50z timeSync: adjusting RTC by 711153529
7/14/22 23:38:50z timeSync: adjusting RTC by 711157129

Poor WiFi is my first guess. RSSI under -70 would be better. Screwed up clock could also be contributing. You need to fix that and then wipe the datalogs.

OK. Thanks.
For the RTC I’ve used PCF85063A instead of PCF8523.
I’ll replace it with PCF8523 as you mentioned at the link