503 service unavailable in Oregon

We are hosted in AWS Oregon.
and we get the following errors(from time to time) when we call :
https://gw-client-api-rest.inx.co

The call is ab API call.

An error at 2022-04-28T16:01:45.746+01:00


<html><head><title>503 Service Temporarily Unavailable</title></head><body><center><h1>503 Service Temporarily Unavailable</h1></center><hr><center>cloudflare</center></body></html><!-- a padding to disable MSIE and Chrome friendly error page --><!-- a padding to disable MSIE and Chrome friendly error page --><!-- a padding to disable MSIE and Chrome friendly error page --><!-- a padding to disable MSIE and Chrome friendly error page --><!-- a padding to disable MSIE and Chrome friendly error page --><!-- a padding to disable MSIE and Chrome friendly error page -->
<html><head><title>503 Service Temporarily Unavailable</title></head><body><center><h1>503 Service Temporarily Unavailable</h1></center><hr><center>cloudflare</center></body></html><!-- a padding to disable MSIE and Chrome friendly error page --><!-- a padding to disable MSIE and Chrome friendly error page --><!-- a padding to disable MSIE and Chrome friendly error page --><!-- a padding to disable MSIE and Chrome friendly error page --><!-- a padding to disable MSIE and Chrome friendly error page --><!-- a padding to disable MSIE and Chrome friendly error page --> (edited)

We run trace from our server to the host and the response looks good
We believe that it is related to request limit on the Cloudflare center.

what should we do ?

Here is some additional info:

mtr -n -T -c 200 gw-client-api-rest.inx.co --report
Start: 2022-04-29T11:56:42+0000
HOST: ip-10-100-188-35.us-west-2. Loss% Snt Last Avg Best Wrst StDev
1.|-- 10.100.44.244 0.0% 200 0.2 0.2 0.1 1.2 0.1
2.|-- ??? 100.0 200 0.0 0.0 0.0 0.0 0.0
3.|-- 240.0.64.5 37.5% 200 1.0 1.0 0.8 3.0 0.3
4.|-- 240.0.64.23 49.0% 200 1.5 0.9 0.7 1.7 0.2
5.|-- 108.166.236.5 16.5% 200 1.1 1.0 0.8 2.2 0.2
6.|-- 241.0.2.66 0.0% 200 1.2 6.0 0.8 1010. 71.4
7.|-- 108.166.228.60 0.0% 200 1.1 11.6 0.8 1030. 101.5
8.|-- 100.95.17.17 0.0% 200 7.9 53.0 0.8 3030. 282.1
9.|-- 100.100.18.2 0.0% 200 2.2 53.5 0.9 3032. 282.1
10.|-- 100.100.2.78 0.0% 200 6.0 51.2 1.0 3037. 273.9
11.|-- 100.92.109.139 0.0% 200 6.4 12.8 1.0 1027. 72.2
12.|-- 100.92.109.161 0.0% 200 6.1 38.8 5.7 1040. 174.5
13.|-- 150.222.102.154 0.0% 200 6.4 38.4 5.7 1031. 173.7
14.|-- 150.222.102.26 0.0% 200 6.8 7.2 5.5 25.6 2.4
15.|-- 172.66.43.97 0.0% 200 6.3 16.8 5.6 1032. 102.3

traceroute to gw-client-api-rest.inx.co (172.66.43.97), 30 hops max, 60 byte packets
1 10.100.44.244 0.088 ms 0.081 ms 0.173 ms
2 * * *
3 * 240.0.120.6 1.136 ms *
4 240.0.120.30 1.126 ms 240.0.120.19 1.125 ms *
5 241.0.2.66 1.105 ms 108.166.228.45 1.092 ms 108.166.228.46 1.106 ms
6 241.0.1.64 1.083 ms 108.166.236.26 1.041 ms 108.166.236.18 1.020 ms
7 242.0.51.17 4.648 ms 242.0.50.145 0.951 ms 242.0.55.193 10.733 ms
8 100.95.1.23 1.246 ms 100.95.1.11 1.296 ms 100.95.1.7 1.049 ms
9 100.95.1.13 0.969 ms 100.95.17.5 1.617 ms 100.95.17.3 1.457 ms
10 100.92.109.145 6.155 ms 52.95.40.96 7.554 ms 100.100.18.92 1.466 ms
11 100.92.109.137 7.411 ms 100.92.109.163 6.153 ms 52.95.40.144 6.682 ms
12 150.222.102.4 5.956 ms 150.222.102.154 6.334 ms 52.95.40.70 7.255 ms
13 99.83.95.33 6.226 ms 100.92.35.114 6.397 ms 99.83.95.35 9.226 ms
14 172.66.43.97 6.608 ms 5.454 ms 6.233 ms

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